Freshwater fish

New Zealand’s native fish are doing their best to climb up ramps in a NIWA laboratory so scientists can learn how to better help them navigate our tricky waterways.

Dr Alvin Setiawan talks about recirculating aquaculture systems.

A new study has identified seven freshwater species native to Aotearoa-New Zealand that will likely be highly or very highly vulnerable to climate change.

These are some recent publications related to the freshwater species ecology and management programme.

NIWA is helping to ensure that New Zealand’s unique and iconic freshwater species are healthy, abundant and thriving.

Tiny, translucent eels may hold the answers to one of the fish world’s great mysteries. Zen Gregor investigates.

Contraptions that resemble upside-down kitchen sinks have been placed in the Waikawa River in Southland to attract a notoriously elusive native fish species.

Under the light of the moon where the river meets the sea, NIWA researchers are planning to catch tiny fish that are all but invisible to the naked eye.

NIWA freshwater scientists are pinning their hopes of solving an age-old mystery on 10 female longfin eels who are about to begin an epic journey to their spawning grounds somewhere in the Pacific Ocean.

The tiny inanga have been plucked from Waikato streams and held in a darkened laboratory for the last month, undertaking highly advanced testing to find the strongest, fittest and fastest fish.

In a secret training location on the outskirts of Hamilton, a squad of whitebait is being put through its paces by fish scientists.